Instabilities and Particle Production in S-Brane Geometries

Abstract

We study the classical stability of a class of S-brane geometries having cosmological horizons. By considering the perturbations of the metric in these geometries we establish that their horizons are unstable in the sense that an observer trying to cross the horizon experiences an infinite flux of radiation at the instant of crossing. The backreaction of this radiation is likely to convert the horizons into curvature singularities, similar to the instability of the internal Cauchy horizon of the Reissner-Nordstrom black hole. We also compute the particle production by the time-dependent fields in the future regions of these geometries, and find that the spectrum of produced particles is thermal, with temperature coinciding with the Hawking temperature computed by euclideanizing the metric in the static region. Possible implications of these results are discussed.

17 pages, 4 figures, JHEP3.cls. Typos corrected, section 2 extended, reference added

References in corpus (2)

• Intersection Rules for S-Branes
• Non-existence of a dilaton gravity action for the exact string black hole

Cited by in corpus (27)

• Time-dependent Orbifolds and String Cosmology
• S-Brane Thermodynamics
• Holographic Cosmology 3.0
• Prospects of Inflation
• Remarks on Tachyon Driven Cosmology
• General Brane Geometries from Scalar Potentials: Gauged Supergravities and Accelerating Universes
• Inflation from Superstring/M Theory Compactification with Higher Order Corrections I
• Inflation from M-Theory with Fourth-order Corrections and Large Extra Dimensions
• SD-brane gravity fields and rolling tachyons
• Inflation from Superstring/M-Theory Compactification with Higher Order Corrections II -- Case of Quartic Weyl Terms --
• Accelerating Universes in String Theory via Field Redefinition
• The Role of Angular Momentum and Cosmic Censorship in the (2+1)-Dimensional Rotating Shell Collapse
• Regular S-Brane Backgrounds
• Time Evolution via S-branes
• Bouncing Braneworlds Go Crunch!
• On Bouncing Brane-Worlds, S-branes and Branonium Cosmology
• Twisting S-branes
• Non-Standard Intersections of S-Branes in D=11 Supergravity
• Backreaction and the rolling tachyon -- an effective action point of view
• The Schrödinger Wave Functional and S-branes
• Dimensional reductions of M-theory S-branes to string theory S-branes
• Weyl Card Diagrams and New S-brane Solutions of Gravity
• Weyl Card Diagrams
• The Strong Energy Condition and the S-Brane Singularity Problem
• A note on the singularity theorem for supergravity SD-branes
• Colliding $p$-branes in the dynamical intersecting brane system
• A Gravity Dual of Localized Tachyon Condensation in Intersecting Branes